P: Photocopier

That god-forsaken piece of crap that you have to use to produce reams and reams of handouts that you give to your students, and which they promptly throw away. And what are these photocopiers--holdovers from the Stone Age? Why is it (you constantly ask yourself) that I've had to become an expert in taking apart these machines, fixing the problem (paper jam, etc.), and then putting them back together again? Why didn't I just become a mechanic or an engineer and get a well-paying job?